Reddit reviews Digital Tachometer Handheld Photo Laser Tachometer Non Contact Digital Tach Meter RPM Meter
We found 7 Reddit comments about Digital Tachometer Handheld Photo Laser Tachometer Non Contact Digital Tach Meter RPM Meter. Here are the top ones, ranked by their Reddit score.
✔Measures the rotational speed with a visible red light beam from a powerful LED✔High intensity class II laser measures from 2.5 - 99,999 RPM✔Extra large 5-digit LCD display, high accuracy of +/- 0.05%✔Optical Tachometer: Auto zero adjustment, stores last, minimum, and maximum readings
What are you trying to simulate? RC helicopters can run at a wide variety of rotor speeds depending on blade geometry and performance goals. High performance 3D flight will often see head speeds of 3000-4000 RPM on platforms as large as 600 size. If you're going for efficiency you can get asymmetrical blades and run much lower head speed (~1000 RPM or even lower has been done). Any speed between those two is a realistic speed, so the choice of what speed to use is for you to decide depending on what makes sense in the context of your application.
This is true for collective-pitch helicopters. If you're talking specifically about fixed pitch helicopters then head speed is directly tied to lift, in which case it still doesn't do a lot of good to choose a particular head speed because the chosen head speed will vary based on the lift required at any given time.
You don't need a strobe though, and tachs aren't that expensive.
The tach can still be off. Laser tachs are pretty cheap.
What RPM are you looking to idle at? 700?
Tachometers are overrated. If you need to 'calibrate' a variable speed knob, pickup one of these;
https://www.amazon.com/Digital-Photo-Laser-Tachometer-Contact/dp/B001N4QY66/ref=sr_1_4?ie=UTF8&qid=1523578148&sr=8-4&keywords=tachometer&dpID=511BEAxqKFL&preST=_SX300_QL70_&dpSrc=srch
I have been debating buying one of these for my router table. I was hoping someone could tell me if there is a way to connect some kind of tachometer to the motor to display RPM.
edit: Nevermind. Apparently they make this thing
I have no idea where to find that information, but I own one of these http://amzn.com/B001N4QY66 and I would use that and a power drill creatively to compare the ratio. Probably remove the tach and speedo and use the drill to spin the tach/speedo and compare an actual measurement of the drill with the measurement on the speedo/tach. I used my power drill to test out my tach when I had to disassemble and clean it to get it to work when I first bought my bike.
I don't know how much you consider "stupid expensive" but I got something like this, and I'm sure if you look at ebay they're even cheaper than this one.
https://www.amazon.com/Digital-Photo-Laser-Tachometer-Contact/dp/B001N4QY66
Through the remote monitoring device: https://www.amazon.com/Digital-Photo-Laser-Tachometer-Contact/dp/B001N4QY66/ref=mp_s_a_1_1?ie=UTF8&qid=1549557310&sr=8-1-spons&pi=AC_SX236_SY340_FMwebp_QL65&keywords=laser+tachometer&psc=1